Factory pattern for test and live web services

Can web services be used in a factory pattern given that the code is auto-generated and I do not want to alter it (to add a base class for example)?

A reason to do this would be if you had 2 web services that were identical but one was for test data and one was for li开发者_开发百科ve data and you wanted to switch between the services based on the environment the code was runnig in.

[Edit]

I am using C# 3.

If you're using C# and SOAP, you can change the destination at runtime:

var webSvc = new WebServerObjectName();
webSvc.Url = "http://examples/com/foo.asmx"; 

//or pull from .config, etc.  
webSvc.Url = ConfigurationManager.AppSettings["WebServiceUri"].ToString();

//make the call to the web method
var custs = webSvc.GetCustomerList();

The flow would be:

• at design-time, make the web reference. Establish the contract, and code for it (input & output params). You'll only need to make it once, as long as the contract stays the same.
• at run-time, change the URL/URI/target of the web service. Obviously it would have to have the same contract/params/method signature, otherwise the call would fail at runtime.
• make the call